Remove unused code from Linkedin module
Remove unused code from Linkedin module

fixes: CNVS-12494

test plan:
* regression test for linkedin

Change-Id: Ibf6c78d767301184bc487813384f7c33ad78997a
Reviewed-on: https://gerrit.instructure.com/33428
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
QA-Review: Trevor deHaan <85df72112e8a9484fec7b3db2e31789c2c2d4e07@instructure.com>
Product-Review: Jason Madsen <bcb5fff571a20f07c35d17ba9c364855c776dce7@instructure.com>

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